NO167938B

NO167938B - DEVICE BY PUMP OR COMPRESSOR

Info

Publication number: NO167938B
Application number: NO875407A
Authority: NO
Inventors: Leif Dag Henriksen
Original assignee: 3H Invent As
Priority date: 1987-12-23
Filing date: 1987-12-23
Publication date: 1991-09-16
Also published as: CA1334661C; ATE78901T1; FI903100A0; NO875407D0; NO875407L; AU633250B2; EP0395710B1; DE3873352D1; EP0395710A1; AU2909889A; NO167227C; NO167227B; NO902693D0; MX170497B; ES2012934A6; DE3873352T2; NO902693L; NO167938C; DK153190D0; DK153190A

Abstract

A valve arrangement for compressor with oscillating piston wings (116b) has a series of mutually angularly displaced discharge slots (119) arranged in a radially extending end wall (113) between working chamber of the machine and on oppositely disposed discharge chamber (111b). The discharge slots (119) are controlled by their respective spring-loaded valve member (112b). The valve member (112b) is inserted in the end wall (113) in a groove (121) which has a minimum opening directed towards the working chamber and a maximum opening directed towards the discharge chamber (111b). A valve seat (121a) is arranged between these openings. The inner surface of the valve is flush or substantially flush with the adjacent inner surface of the working chamber.

Description

Den foreliggende oppfinnelse vedrører en anordning ved maskin, såsom pumpe eller kompressor, med en statordel som omfatter en maskinhusdel og et par endedekseldeler og med en oscillatordel som omfatter en vippestempeldel med et antall radialt utadrettete stempelvingepartier, som er svingbare frem og tilbake i hvert sitt innbyrdes adskilte hulrom i statordelen til oppdeling av det respektive hulrom i to motsvarende arbeidskamre, idet hvert arbeidskammer er avgrenset mellom maskinhusdelen, de to endedekseldeler og skillevegger som rager radialt innad fra maskinhusdelen samt vippestempeldelen med tilhørende stempelvingepartier, mens hvert arbeidskammer kommuniserer med et mediuminntak ved hjelp av en første type portåpning og med et mediumuttak ved hjelp av en andre type portåpning. The present invention relates to a device for a machine, such as a pump or compressor, with a stator part comprising a machine housing part and a pair of end cover parts and with an oscillator part comprising a tilting piston part with a number of radially outwardly directed piston wing parts, which can be pivoted back and forth in each other separate cavities in the stator part to divide the respective cavity into two corresponding working chambers, each working chamber being delimited between the machine housing part, the two end cover parts and partitions that project radially inwards from the machine housing part as well as the tilting piston part with associated piston wing parts, while each working chamber communicates with a medium inlet by means of a first type of port opening and with a medium outlet by means of a second type of port opening.

Med den foreliggende oppfinnelse tar man sikte på en pumpe, kompressor eller liknende, som for det første har en enkel og driftssikker innvendig konstruksjon med få bevegelige deler og med en nøyaktig virkemåte, slik at man med enkle midler kan oppnå lavt støynivå, høy virkningsgrad, lav vekt/materialforbruk, lite volum og høy kapasitet for pumpen, kompressoren eller liknende, og som for det andre har en enkel, forholdsvis kompakt og ukom-plisert ytre utforming, slik at den kan brukes for mange forskjellige anvendelsesformål, hvor det eksempelvis er behov for en lite plasskrevende, forholdsvis lettvekts konstruksjon. With the present invention, one aims at a pump, compressor or similar, which, firstly, has a simple and reliable internal construction with few moving parts and with a precise mode of operation, so that with simple means one can achieve a low noise level, a high degree of efficiency, low weight/material consumption, small volume and high capacity for the pump, compressor or similar, and which, secondly, has a simple, relatively compact and uncomplicated external design, so that it can be used for many different purposes, where, for example, there is a need for a relatively light-weight construction that does not require much space.

Med den foreliggende oppfinnelse tar man samtidig sikte på en løsning hvor man kan oppnå effektiv avtetning og effektiv lagring av rotordelen i statordelen, og spesielt tar man sikte på å oppnå lettvint og sikker styring av portåpningene fra og til arbeids kamrene, idet man er spesielt cpptatt av at varmen som ut-vikles i maskinen ikke skal virke i ugunstig retning på driften av maskinen. With the present invention, the aim is at the same time a solution where effective sealing and efficient storage of the rotor part in the stator part can be achieved, and in particular the aim is to achieve easy and safe control of the port openings from and to the working chambers, being particularly cppatt that the heat developed in the machine should not have an adverse effect on the operation of the machine.

Anordningen ifølge oppfinnelsen er kjennetegnet ved at en eller flere portåpninger av den første type portåpning som har et radialt forløp, er felles for hvert hulroms to arbeidskamre og åpnes og lukkes ved relativ bevegelse mellom statoren og oscillatoren, at portåpningene av den andre type, som har et aksialt forløp, er anordnet separat for hvert arbeidskammer på hver sin side av et felles stempelsvingeparti og åpnes og lukkes av et trykkmediumstyrt dekkstykke. The device according to the invention is characterized in that one or more port openings of the first type of port opening which have a radial course, are common to each cavity's two working chambers and are opened and closed by relative movement between the stator and the oscillator, that the port openings of the second type, which have an axial course, is arranged separately for each working chamber on either side of a common piston swing section and is opened and closed by a cover piece controlled by pressure medium.

Ved ovennevnte løsning kan man utforme maskinens ytre på vilkårlig egnet måte, eksempelvis med glatt, sylindrisk form, og samtidig med mulighet for lettvint å motvirke at varme som ut-vikles i maskinen skal komplisere driften, ved å styre portåpningene på enkel og lett kontrollerbar måte. Ifølge oppfinnelsen kan man således styre lukking og åpning av de forskjellige portåpninger ganske enkelt ved hjelp av rotorens vippebevegeIse i forhold til statoren, uten behov for ekstra, utvendige styre-org aner. With the above solution, the outside of the machine can be designed in an arbitrarily suitable way, for example with a smooth, cylindrical shape, and at the same time with the possibility of easily counteracting the heat developed in the machine from complicating the operation, by controlling the port openings in a simple and easily controllable way . According to the invention, the closing and opening of the various gate openings can thus be controlled simply by means of the tilting movement of the rotor in relation to the stator, without the need for additional, external control organs.

Ifølge oppfinnelsen foretrekkes det at den første type portåpninger er anordnet i vippestempeldelens navparti i direkte kommunikasjon med et mediuminntak som løper sentralt i navpartiet, idet den første type portåpninger er anordnet i den relative bevegelsesbane for statordelens skillevegg for åpning av portåpningene vekselvis på motstående sider av skilleveggen. According to the invention, it is preferred that the first type of port openings are arranged in the hub part of the rocker piston part in direct communication with a medium intake that runs centrally in the hub part, the first type of port openings being arranged in the relative movement path of the stator part's partition wall for opening the port openings alternately on opposite sides of the partition wall .

Herved oppnår man den fordel at mediuminntakets portåpning (er) kan utformes med forholdsvis stort portåpningsareal og samtidig kan anordnes klart adskilt fra mediumuttakets portåpninger og kan styres på enkel måte alene av skilleveggens radialt innerstliggende flate: Nevnte innerstliggende flate kan eksempelvis danne radial lagringsflate for rotoren og kan derved lettvint sikre effektiv avtetning henholdsvis effektiv frilegging av portåpningene i de forskjellige vippeposisjoner. This achieves the advantage that the medium inlet's port opening(s) can be designed with a relatively large port opening area and at the same time can be arranged clearly separated from the medium outlet's port openings and can be controlled in a simple way only by the radially innermost surface of the partition wall: Said innermost surface can, for example, form a radial bearing surface for the rotor and can thereby easily ensure effective sealing or effective opening of the gate openings in the various tilting positions.

I sistnevnte anledning foretrekkes videre at den andre type portåpning, som har et aksialt forløp, omfatter en portåpning til hvert sitt arbeidskammer, hvor portåpningen gjennomløper et skiveformet endestykke og på den mot mediumuttaket vendende side er tildekket av et som tilbakeslagsventil virkende dekkstykke. In the latter case, it is further preferred that the second type of port opening, which has an axial course, comprises a port opening for each separate working chamber, where the port opening runs through a disc-shaped end piece and is covered on the side facing the medium outlet by a cover piece acting as a non-return valve.

Herved kan man på tilsvarende enkel måte sikre lettvint avtetning av portåpningen bare ved hjelp av et styretrykk i mediumuttaket henholdsvis arbeidstrykket i arbeidskammeret. I tillegg kan man oppnå styring med et visst overtrykk i forhold til mediumuttakets trykk, ved at dekkstykket virker med en iboende fjærkraft mot arbeidstrykket. In this way, easy sealing of the port opening can be ensured in a similarly simple way only by means of a control pressure in the medium outlet or the working pressure in the working chamber. In addition, it is possible to achieve control with a certain excess pressure in relation to the pressure of the medium outlet, by the cover piece acting with an inherent spring force against the working pressure.

Konstruksjonsmessig foretrekkes det at portåpningene av den andre type portåpning er i form av langstrakte radialtløpende slisser og at dekkstykket omfatter et ringformet bæreparti hvorfra det rager fritt endende utad radialtløpende fliker som er innrettet til å tildekke hver sin sliss, styrt av trykket i mediumuttaket, og som er innrettet til å avdekke hver sin sliss, styrt av et overtrykk i det tilstøtende arbeidskammer. In terms of construction, it is preferred that the port openings of the second type of port opening are in the form of elongated radially running slots and that the cover piece comprises an annular support part from which free-ending outwardly radially running flaps protrude which are designed to cover each slot, controlled by the pressure in the medium outlet, and which is arranged to uncover each slot, controlled by an overpressure in the adjacent working chamber.

<y>tterligere trekk ved foreliggende oppfinnelse vil fremgå av den etterfølgende beskrivelse under henvisning til de med-følgende tegninger, som viser foretrukne utførelseseksempler, og hvor i: Fig. 1 viser et vertikalsnitt av en kompressor ifølge oppfinnelsen. Fig. 2 viser i perspektivriss de vesentligste deler av kompressoren ifølge fig. 1 trukket aksialt fra hverandre for å vise delene hver for seg. Further features of the present invention will be apparent from the following description with reference to the accompanying drawings, which show preferred embodiments, and where i: Fig. 1 shows a vertical section of a compressor according to the invention. Fig. 2 shows a perspective view of the most important parts of the compressor according to fig. 1 pulled apart axially to show the parts separately.

Ifølge fig. 1 og 2 omfatter kompressoren 10 en stator bestående av et manifoldhus 11, et ventilorgan 12, et første endestykke 13, en kompressorhusdel 14 med skillevegger 14a og et andre endestykke 15 og en oscillator bestående av en vippestempeIdel 16 med et sylindrisk, hylseformet navparti 16a og flere fra dette radialt utadrettete stempelvingepartier 16b. Eksempelvis kan det benyttes fire stempelvingepartier 16b, slik som vist, eller fem eller seks stempelvingepartier, der dette måtte ønskes. According to fig. 1 and 2, the compressor 10 comprises a stator consisting of a manifold housing 11, a valve member 12, a first end piece 13, a compressor housing part 14 with partitions 14a and a second end part 15 and an oscillator consisting of a tilting piston part 16 with a cylindrical, sleeve-shaped hub part 16a and several from this radially outwardly directed piston wing parts 16b. For example, four piston wing sections 16b can be used, as shown, or five or six piston wing sections, where this is desired.

Som vist i fig. 1 er manifoldhuset 11 utstyrt med et radialt innerste mediuminntak lia som direkte kommuniserer med en<x >aksialt løpende kanal 17 innvendig i navpartiet 16a som er utstyrt med fire par (bare to par er vist i fig.2) av aksialt løpende, første type portåpninger, i form av langstrakte og smale slisser 18, som radialt gjennomløper navpartiets gods og som styres av navpartiets 16a bevegelse i forhold til kompressor-husets skillevegger 14a. Endestykket 13 er utstyrt med fire par av radialt løpende, andre type portåpninger, i form av langstrakte og smale slisser 19 som aksialt gjennomløper endestykkets 13 gods. Ventilorganet 12 omfatter et ringformet bæreparti 12a hvorfra det rager radialt innad fire par ventildeldannende fliker 12b, som er innrettet til stasjonært å overlappe portåpningene 19, idet portåpningene 19 er innrettet til å lukkes med flikene 12b ved hjelp av mediumtrykket på nedstrømssiden av mediumuttaket henholdsvis ved hjelp av iboende fjærtrykk i flikene 12b. Portåpningene 19 er innrettet til å åpnes ved arbeidstrykket som bygger seg opp aksialt innenfor endestykket 13. I praksis frem-stilles ventilorganet 12 av et særlig tynnvegget, noe fjærende materiale, idet ventilorganet fastklemmes stasjonært mellom endestykkets 13 radialt ytre omkretsparti og manifoldhusets 11 radialt ytre omkretsparti med et visst spillerom for flikenes 12b bevegelse bort fra portåpningene 18. I utførelseseksemplet ovenfor er det beskrevet en kompressor, men løsningen kan like gjerne anvendes som pumpe, så vel for gassformige som for væskeformige pumpemedia. I et slikt tilfelle danner mediuminntaket lia pumpens sugeside, mens mediumuttaket 11b danner pumpens avløpsside. As shown in fig. 1, the manifold housing 11 is equipped with a radially innermost medium inlet 11a which directly communicates with an<x>axially running channel 17 inside the hub part 16a which is equipped with four pairs (only two pairs are shown in fig.2) of axially running, first type port openings, in the form of elongated and narrow slits 18, which run radially through the goods of the hub part and which are controlled by the movement of the hub part 16a in relation to the compressor housing's partition walls 14a. The end piece 13 is equipped with four pairs of radially running, second type port openings, in the form of elongated and narrow slits 19 which axially pass through the end piece 13's goods. The valve member 12 comprises an annular support part 12a from which protrudes radially inwards four pairs of valve part-forming flaps 12b, which are arranged to overlap the port openings 19 in a stationary manner, the port openings 19 being arranged to be closed with the flaps 12b by means of the medium pressure on the downstream side of the medium outlet respectively by means of of inherent spring pressure in the tabs 12b. The port openings 19 are arranged to be opened by the working pressure that builds up axially within the end piece 13. In practice, the valve member 12 is made of a particularly thin-walled, somewhat resilient material, the valve member being clamped stationary between the radially outer circumferential portion of the end piece 13 and the radially outer circumferential portion of the manifold housing 11 with a certain leeway for the flaps 12b to move away from the port openings 18. In the embodiment example above, a compressor is described, but the solution can just as well be used as a pump, both for gaseous and for liquid pump media. In such a case, the medium inlet 11b forms the pump's suction side, while the medium outlet 11b forms the pump's discharge side.

Claims

1. Device at a machine, such as a pump or compressor (10), with a stator part comprising a machine housing part (14) and a pair of end cover parts (13,15) and with an oscillator part comprising a tilting piston part (16) with a number of radially outwardly directed piston wing parts (16b) which are pivotable back and forth in each mutually separate cavity in the stator part to divide the respective cavity into two corresponding working chambers, each working chamber being delimited between the machine housing part (14), the two end cover parts (13,15) and partitions ( 14a) which project radially inwards from the machine housing part as well as the tilting piston part (16) with associated piston wing parts (16b), while each working chamber communicates with a medium inlet (lia) by means of a first type of port opening (18) and with a medium outlet (11b) at using a second type of gate opening (19), characterized by that one (27) or more (18) gate openings of the first type of gate opening which have a radial course, are common to each cavity's two working chambers and are opened and closed by relative movement between the stator and the oscillator, that the gate openings (19) of the second type, which have an axial course, are arranged separately for each working chamber on either side of a common piston swing section and are opened and closed by a pressure medium controlled cover piece (12)

2. Device in accordance with claim 1, characterized by that the first type of port openings (18) are arranged in the hub part (16a) of the tilting piston part (16) in direct communication with a medium intake (channel 17) which runs centrally in the hub part (16a), the first type of port openings (18) being arranged in the relative movement path of the stator part partition wall (14a) for opening the port openings (18) alternately on opposite sides of the partition wall (14a).

3. Device in accordance with claim 2, characterized by that the second type of gate opening (19), which has an axial for- run, comprises a port opening (19) to each working chamber, where the port opening runs through a disk-shaped end piece (13) and on the side facing the medium outlet (11b) is covered by a cover piece (12) acting as a non-return valve. 4.. Device in accordance with claim 3, characterized by d that the gate openings of the second type of gate opening are in the form of elongated, radially running slots (19), and that the cover piece (12) comprises an annular support part (12a) from which radially running flaps (12b) protrude freely outwards and are arranged to cover each of the slits (18), controlled by the pressure in the medium outlet, and which are arranged to cover each of slot (19), controlled by an overpressure in the adjacent working chamber.